Friday, 10 August 2012

Turmeric paper acid alkali indicator:Science at The Chicken Shed

Our own home-made pH paper. 

We soaked blotting paper (any thickish absorbent paper will do) in a solution of turmeric in alcohol. (Rubbing alcohol is recommended - we used meths, cos that's what we had). 

Dipping the strip into acid substances, such as vinegar should turn the strip a deep orange/red. If you hold the strip over an open bottle of ammonia (we didn't have any) it should then turn pale again.

Krampf has a good video on this (only available to members, tho') here at thehappyscientist

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